. >> warner: for more on the clashes and the response by president morsi, i'm joined now by michele dunne. she previously served in the state department and the national security council staff. she's now the director of the rafik hariri center for the middle east at the atlantic council. welcome back. how serious a crisis is this for this new egyptian government and for president morsi himself? >> it's a pivotal moment in the history of egypt after this revolution we're seeing extreme polarization between islamists and non-islamist forces and between parts of the government that that contain people who were there during the mubarak regime. there are a number of senior judges. so there's a lot at stake centering on this debate over the constitution and whether it should go to a public vote. >> warner: the islamists and secularists have been at loggerheads for over a year. why has it hit such a -- at least it looks like a crisis point now, with this kind of violence between the two camps. >> there have been a couple things that have happened in the past couple weeks. with this november 22 d